Pneumatic tool.



No. 739,608. PATENTED SEPT. 22, 1903.

, H. G. ROTTEN.

PNEUMATIC TOOL.

APPLIUATIOH rum JAN 1. 190a.

HERMAN e. KOTTEN,

' Patented September 22, 1903".

PATENT OFFICE.

OF NEW YORK, N. Y.

PNEUMATIC TOOL.

.srnormcarro v formingpart of Letters Patent No. 739,608, dated September 22,- 1903. Application filed January 7, 1903. $91M! NO- 1 (1W0 Infidel.)

To all whom it nutty concern:

Be it known that I, HERMAN G. KOTTEN, acitizen of the United States, residing in the city and county of New York, State of New York, have invented a new and useful linprovement in Pneumatic Tools, of which the following is a specification.

Heretofore in the manipulation of pneumatic hand-tools having a reciprocating piston therein adapted to hammer on the shank of the working tool it has been customary for the workman to grasp the chisel, drill, or bit with one hand, usually his left hand, and the rear end or handle of the tool with his right hand, the tool being usually non-rotative and the rotation of the Working tool being effected by the workmans hand grasping the same. This operation is very fatiguing, especially in the operation of drilling stone or similar material, wherein the working tool is usually a fiat drill, and in order to drill around hole it is necessary to give the drill or hit a full h'alfturn to produce the best results.

In my present invention I have devised a novel appliance for enabling the bit to be turned with ease, wherein I apply a lever to a suitable portion of the bit, chisel, drill, or other working tool or to the chisel-bushing, or, if desired, to the cylinder of the tool, the handle thereof working on ball-bearings.

By the foregoing improvements 1 am enabled to eifect the desired rotation of the working tool in a positive and effective manner and with greater ease than heretofore; and to the above ends my invention consists, broadly, of novel means for efiecting the rotation of the working tool by the application of a lever thereto or to a suitable part of the implement carrying said working tool.

Figure 1 represents a perspective view of a pneumatic tool and its adjuncts embodying my invention. Figs. 2 and 3 represent side elevations of other forms of pneumatic tools and their adjuncts to which my invention is applicable. Fig. 4 represents, on an enlarged scale, 'a sectional view of the nose-piece of the forward end ofthe cylinder provided with a beveled end. Fig. 5 represents, on an enlarged scale, a sectional View of the nosepiece and its adjuncts, the cylinder being shown as havinga beveled edge. Fig. 6 rep resents a perspective view of the bit or drill seen in Fig. 1.

Similar numeralsof reference indicate'corresponding parts in the figures.

Referring to the drawings, 1 designates the cylinder of a pneumatic tool having the nose-v piece or chisel-bushing 2, which has a cylindrioal socket therein for the reception of the round portion 3 of the chisel, bit, drill," or other working tool 4, which has the flattened drill-point 5, which is adapted to be applied to the work. The tool 4 is provided with a.

polygonal surface 6, to which is applied the lever 7, having the head 8, provided with the polygonal opening 9 therethrough, the manvner of assembling and operating the parts be- 'ing' understood from Fig. 1, wherein it can be which is equally applicable to pneumatic tools of the well-known Kotten and Keller types, unprovided'with valves or graspinghandles, or to tools having valves and handles thereon, which handles may or may not, as

desired, be equipped with manuallyoperated V throttle-valves for the purpose of controlling the initial admission of motive fluid to the tool.

In Fig. 2 Ihave shown a pneumatic tool 13 of the same general character as seen in Fig.

1, wherein the hammering-piston l4 hammers on the shank 15 of the drill 16, which has a squared portion seated in the chisel-bushing 17, which latter has the rounded exterior portion 18 situated in the cylindrical seat 19 in the front end of the cylinder 13. The bushing 18 is prevented from longitudinal movement by the screw or its "equivalent 20, whose end enters the groove 21 in said bushing, so that while the latter is capable of rotary movement it is prevented from longitudinal movement,as is evident. The outer portion 22 of the chisel-bushing may be squared or of polygonal contour for the application of the squared head 8 of the lever 7 thereto, it being apparent that during the act of drilling the drill 16 and the chisel-bushing 17 are rotated to the desired extent in unison by the application of the lever thereto. In practice, however, I prefer to screw the lever 23 directly into the chisel-bushing 17, as will be understood from Figs. 2 and 5, so that the said lever and chisel-bushin g act substantially as a single integral element, the drill 16 being held to the work by the application of the workmans hand to the handle 24 and the rotation being effected by the application of force to the lever 23 by the other hand of the workman.

In Fig. 3 I have shown another embodiment of the principle of my invention,wherein 25 designates the pneumatic tool, having the working tool 26 therein,said tool being provided with the polygonal portion 27 whereby the drill and the cylinder 25 are rotated in unison. 26 designates the supply hose which leads the motive fluid to the tool, the supply of said motive fluid being controlled bya rotary throttle-valve 27 of any appropriate internal construction of such character that the rotation of the throttle-valve or sleeve 27 will admit or cut off the flow of compressed air to the tool. The throttle-valve or rotary sleeve 27 is mounted upon the extension 28, which is hollow and leads the compressed air into the cylinder through a suitable port, as 29, in the block 30, said block having the rounded extension 31, which is provided with the groove 32, in which is located an end of tion of the handle 31, whereby friction is reduced to a minimum.

I prefer in practice to employ the construction seen in Figs. 1 and 2, and it will be apparent that other devices may be designed which will fall within the scope of myinvention, and I do not, therefore, desire to be limited in every instance to the exact construction I have shown herein and described. It is further essential in the successful operation of tools of this character that the rounded portion or shank 3 of the working tool should be held within the nose-piece 2, substantially as shown in Fig. 4, and I therefore provide a shoulder 35 against which the head 8 of the lever 7 is adapted to contact, as will be clearly understood from Figs. 1, 4, and 6. It will therefore be seen that the lever 7 serves a twofold function, both to hold the shank 3 of the working tool in its proper position with respect to the nose-piece and toolcylinder and also serves to rotate the drillpoint 5 to the desired extent, as has already been explained.

I do not desire to be limited to the precise manner of applying the chisel to the working tool, as it will be apparent that other devices may be employed which will fall within the scope of my invention.

While the tool is ordinarily used in connection with the drilling of stone or similar material, I do not desire to be limited thereto in every instance, since it will be apparent that my invention is applicable to all classes of work now performed by pneumatic tools and to all such operations which have commonly been performed by means of the mallet and hammer impacting upon a working tool held in the hands of the Workman.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pneumatic tool, the combination of a tool-cylinder, a hammering-piston therein, a working tool having its shank adapted to be hammered upon, and means projecting at an angle to said tool-cylinder and engaging said working tool and adapted to be grasped by one hand of the workman, whereby the rotation of the working tool is effectedduring the reciprocations of the piston.

2. In a pneumatic tool, the combination of a tool-cylinder, a hammering-piston therein, a working tool having its shank adapted to be hammered upon, a grasping-handle for pressingthe tool. to its work, and means projecting at an angle to said tool and cylinder and constructed to directly actuate said tool and adapted to be grasped by one hand of the workman, whereby the rotation of the working tool is effected during the reciprocations of the piston.

3. In a pneumatic tool, the combination of a hammering-piston, with the shank of the working tool, and a device projecting from said working tool and adapted to be rotated by the hand of the workman, whereby said tool is turned during the reciprocation of said hammering-piston.-

4. In a pneumatic tool, the combination with the cylinder, nose-piece and hammeringpiston thereof, of the shank of the working tool, and a lever projecting from said working tool and adapted to be rotated by the hand of the workman during the reciprocations of said piston.

5. In a pneumatic tool, the combinatio with the cylinder and ahammering-piston, of a rotatable working tool havingaportion extending within said cylinder, and means directly engaging and projecting at an angleto said tool and cylinder for rotating the working tool during the reciprocation of the piston.

6. In a pneumatic tool, the combination with the cylinder and a hammering-piston, of a rotatable working tool having a portion extending within said cylinder, means projecting at an angle to said tool and cylinder for rotating the working tool during the reciprocation of the piston, a handle and means adjacent the handle for controlling the admission of the motive fluid.

HERMAN G. KOTTEN.

WVitnesses:

JOHN A.W1EDERsHn1M, E. HAYWARD FAIRBANKS. 

